/* 
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
$(function(){
    $('.checkPre').click(function(){
        if (this.checked) {
        $('.checkPre').attr('disabled','true');
        $(this).removeAttr('disabled');
    }else{
        $('.checkPre').removeAttr('disabled');
    }
    });
});